Messages in this thread Patch in this message | | | From | Christoph Hellwig <> | Subject | [PATCH 4/7] ALSA: pcm: use dma_can_mmap() to check if a device supports dma_mmap_* | Date | Mon, 5 Aug 2019 12:11:56 +0300 |
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Replace the local hack with the dma_can_mmap helper to check if a given device supports mapping DMA allocations to userspace.
Signed-off-by: Christoph Hellwig <hch@lst.de> --- sound/core/pcm_native.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 703857aab00f..81c82c3ee8a2 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -220,12 +220,11 @@ static bool hw_support_mmap(struct snd_pcm_substream *substream) { if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_MMAP)) return false; - /* architecture supports dma_mmap_coherent()? */ -#if defined(CONFIG_ARCH_NO_COHERENT_DMA_MMAP) || !defined(CONFIG_HAS_DMA) + if (!dma_can_mmap(substream->dma_buffer.dev.dev)) + return false; if (!substream->ops->mmap && substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) return false; -#endif return true; } -- 2.20.1
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